sonic-buildimage/platform/mellanox/mlnx-platform-api/tests/test_psu.py

#
# Copyright (c) 2021 NVIDIA CORPORATION & AFFILIATES.
# Apache-2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

import os
import sys
if sys.version_info.major == 3:
    from unittest import mock
else:
    import mock

test_path = os.path.dirname(os.path.abspath(__file__))
modules_path = os.path.dirname(test_path)
sys.path.insert(0, modules_path)

from sonic_platform import utils
from sonic_platform.psu import FixedPsu, Psu


class TestPsu:
    def test_fixed_psu(self):
        psu = FixedPsu(0)
        assert psu.get_name() == 'PSU 1'
        assert psu.get_model() == 'N/A'
        assert psu.get_serial() == 'N/A'
        assert psu.get_revision() == 'N/A'
        utils.read_int_from_file = mock.MagicMock(return_value=1)
        assert psu.get_powergood_status()
        utils.read_int_from_file = mock.MagicMock(return_value=0)
        assert not psu.get_powergood_status()
        assert psu.get_presence()
        assert psu.get_voltage() is None
        assert psu.get_current() is None
        assert psu.get_power() is None
        assert psu.get_position_in_parent() == 1
        assert psu.is_replaceable() is False
        assert psu.get_temperature() is None
        assert psu.get_temperature_high_threshold() is None

    @mock.patch('os.path.exists', mock.MagicMock(return_value=True))
    def test_psu(self):
        psu = Psu(0)
        assert len(psu._fan_list) == 1
        assert psu.get_fan(0).get_name() == 'psu1_fan1'
        mock_sysfs_content = {
            psu.psu_presence: 1,
            psu.psu_oper_status: 1,
            psu.psu_voltage: 10234,
            psu.psu_voltage_min: 9000,
            psu.psu_voltage_max: 12000,
            psu.psu_current: 20345,
            psu.psu_power: 30456,
            psu.psu_temp: 40567,
            psu.psu_temp_threshold: 50678
        }

        def mock_read_int_from_file(file_path, **kwargs):
            return mock_sysfs_content[file_path]

        utils.read_int_from_file = mock_read_int_from_file
        utils.read_str_from_file = mock.MagicMock(return_value='min max')
        assert psu.get_presence() is True
        mock_sysfs_content[psu.psu_presence] = 0
        assert psu.get_presence() is False

        assert psu.get_powergood_status() is True
        mock_sysfs_content[psu.psu_oper_status] = 0
        assert psu.get_powergood_status() is False

        assert psu.get_voltage() is None
        assert psu.get_current() is None
        assert psu.get_power() is None
        assert psu.get_temperature() is None
        assert psu.get_temperature_high_threshold() is None

        mock_sysfs_content[psu.psu_oper_status] = 1
        assert psu.get_voltage() == 10.234
        assert psu.get_voltage_high_threshold() == 12.0
        assert psu.get_voltage_low_threshold() == 9.0
        assert psu.get_current() == 20.345
        assert psu.get_power() == 0.030456
        assert psu.get_temperature() == 40.567
        assert psu.get_temperature_high_threshold() == 50.678

        assert psu.get_position_in_parent() == 1
        assert psu.is_replaceable() is True

    def test_psu_vpd(self):
        psu = Psu(0)
        psu.vpd_parser.vpd_file = os.path.join(test_path, 'mock_psu_vpd')

        assert psu.get_model() == 'MTEF-PSF-AC-C'
        assert psu.get_serial() == 'MT1946X07684'
        assert psu.get_revision() == 'A3'

        psu.vpd_parser.vpd_file = 'not exists'
        assert psu.get_model() == 'N/A'
        assert psu.get_serial() == 'N/A'
        assert psu.get_revision() == 'N/A'

        psu.vpd_parser.vpd_file_last_mtime = None
        psu.vpd_parser.vpd_file = os.path.join(test_path, 'mock_psu_vpd')
        assert psu.get_model() == 'MTEF-PSF-AC-C'
        assert psu.get_serial() == 'MT1946X07684'
        assert psu.get_revision() == 'A3'